Cinematographic apparatus.



\ W. H. ANDERSON. CINEMATOGRAPHIC APPARATUS.

APPLICATION FILED SEPT. I 1, 19M.

lutcnte May 23, 1916.

I WITNESSES 6? (51235 EYS .TQGEAPHIG AEPAR-ATUS.

Specification of Le beers Patent.

senses, a subject 01?: the

sin and l'relancl, and r 7' a; Club, Phoenix street, London 7 ringlancl, have irwentedv certcr a e and usefn Improvements 1n and Rel t1 to o inei atographic Apparatus, oi which the iohcwing is a specification.

This invention relates cinematographic apparatus and; more particularly to the means for actuating the safety shutten As is well known the side edges are perforated to erlgage the to draw-oft and Winding-on sprockes which pass the film through the gate usually arranged there two Wheels arranger hettveen the nan 5 c the Windin -on spool 'rncl between wheels is left a slack portion 0'? Winding-on spool being opcr-" tion drive. The perforce" n places in the film and l happen. that the space between l of the periorations be broken or the teeth of the (has oil sprocket "fail to the film from any other cause the feed of the film through gate will cease until the Win cling-on sprockc takes up the aforementioned slack. The him is thus stopped in the gate and there is danger oi? ignition.

The object of the present invention to overcome this drawback, and consists in an arrangement whereby shoul'l there be any tendency for the slack part the film to tighten, the film Willinmiechateiy actuate a switch member to ope nte a safety shutter and so'cut oil the light from the film.

The invention consists of the arrangement wherehy when the slack of the film between the gate ancl the Wincling-cn spool is tightened, the film actuates a lever whereby electric circuit is closed the armature of which actuates the safety shutter agains' the action of a spring, thereby cutting light from the lantern to the fi-lr-m One form of invention is illust by Way of example i 1: drawing, which cli ran nacic e of a cinematograph apparatus shoe-Jig 1 above mentioned improvements,

The film a from top or Winding-oil sprocket'whcel passes hirough the gate 2) around the lower or draw-oft SPYGCkEi: c and from thence over the Winding-on sprocket Wheel d to the spool. on

istenterl May 23,

Eerie. Filo. 863,231.

, necl and the two sprocket Wheels f are geared with each other to give some of speed of the film on their llnen starting a film there is ranged het' en the drawoil sprocket c and the Winning-on sprocket wheel (Z looor slack nortion of film e. llcona stun SlllbiZlOly places on the Ironic. or

..ach1ne is pivoted a bell crank lever, rm 5: carrying a roller h which bears "net the film c, the other arm 9' being ml to l an electric circuit at l moved over. loy the roller it being upon the shortening of the loop or slack the film. The electric circnit which is preferably derived from the source at electric supply as thatv which drives the machine inchules a ClOll", hie limb coil l: k whose iron core on. acts by .iitchle means t close the shutter c in the sol. t anal thus out 01f the light 11, the shutter being retained in or open position by the tension t'. n is as follower-Y'Vhen runrimllt the amount of slack in the V 1 tmeen the sprocket Wheels 0 and. (1 re constant, but should the speed of the Jim 5 rough the gate 6 drop owing to the sprocket Wheel 0 failing to grip the film the v i sprocket wheel 0? takes up the slack in film which latter then engages the oller it and rotates the bell crank lever on fulcrum f, thus closing the electric conact at Z through the arm 7'. The closin of the electric circuit energizes the coil 70, 'WllOSG armature core m Which is connected with the safety shutter s by means of a cord or the like is attracted in opposition to the spring c whereby the shutter is closed and the light from the lantern is cut oil from the film, a any risk of the latter ignitingis thereby avoided. Instead of the bell crank lever operating to close an electric circuit, the movement of the arm may act to open a circuit already closed and thus close the safety shuiter;

now described my invention What chair" as new and desire to secure by Let- "D L a dis A. one 1Si- A cmeinatograph apparatus comprising a ltese cross, a film sprocket integral there 10 contact so that the-solenoid attracts its armature thereby closing the shutter against the action of the spring.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

WALTER HILLIER ANDERSON.

Vfitnesses:

E. E. PUTLAND, P. A. OUTHWAITE. 

